On Mon, Aug 15, 2011 at 5:23 PM, Alexander Motin <m...@freebsd.org> wrote: > On 16.08.2011 00:13, Joe Schaefer wrote: >> >> On Mon, Aug 15, 2011 at 5:00 PM, Alexander Motin<m...@freebsd.org> wrote: >>> >>> On 15.08.2011 23:57, Joe Schaefer wrote: >>>> >>>> On Mon, Aug 15, 2011 at 4:35 PM, Alexander Motin<m...@freebsd.org> >>>> wrote: >>>>> >>>>> On 15.08.2011 22:18, Joe Schaefer wrote: >>>>>> >>>>>> On Mon, Aug 15, 2011 at 9:31 AM, Joe Schaefer<joes...@gmail.com> >>>>>> wrote: >>>>>>> >>>>>>> On Mon, Aug 15, 2011 at 8:32 AM, Andriy Gapon<a...@freebsd.org> >>>>>>> wrote: >>>>>>>> >>>>>>>> on 13/08/2011 20:16 Joe Schaefer said the following: >>>>>>>>> >>>>>>>>> Brand new machine with a Phenom II X6 1100T and under chronic load >>>>>>>>> the clock will stop running periodically until the machine >>>>>>>>> eventually >>>>>>>>> completely >>>>>>>>> freezes. Note: during these stalls the kernel is still running, >>>>>>>>> the >>>>>>>>> machine is still >>>>>>>>> mostly responsive, it's just that the clock is frozen in time. >>>>>>>>> >>>>>>>>> I've disabled Turbo mode in the bios and toyed with just about >>>>>>>>> every >>>>>>>>> other setting but nothing seems to resolve this problem. Based on >>>>>>>>> the >>>>>>>>> behavior >>>>>>>>> of the machine (just making buildworld will eventually kill it, >>>>>>>>> upping >>>>>>>>> the -j flag >>>>>>>>> just kills it faster), I'm guessing it has something to do with the >>>>>>>>> Digi+ VRM features >>>>>>>>> but again nothing I've tried modifying in the bios seems to help. >>>>>>>>> >>>>>>>>> I've tried both 8.2-RELEASE and FreeBSD 9 (head). Running head now >>>>>>>>> with >>>>>>>>> a dtrace enabled kernel. >>>>>>>>> >>>>>>>>> Suggestions? >>>>>>>> >>>>>>>> On head, start with checking what source is used for driving clocks: >>>>>>>> sysctl kern.eventtimer >>>>>>> >>>>>>> % sysctl kern.eventtimer [master] >>>>>>> kern.eventtimer.choice: HPET(450) HPET1(450) HPET2(450) LAPIC(400) >>>>>>> i8254(100) RTC(0) >>>>>>> kern.eventtimer.et.LAPIC.flags: 15 >>>>>>> kern.eventtimer.et.LAPIC.frequency: 0 >>>>>>> kern.eventtimer.et.LAPIC.quality: 400 >>>>>>> kern.eventtimer.et.HPET.flags: 3 >>>>>>> kern.eventtimer.et.HPET.frequency: 14318180 >>>>>>> kern.eventtimer.et.HPET.quality: 450 >>>>>>> kern.eventtimer.et.HPET1.flags: 3 >>>>>>> kern.eventtimer.et.HPET1.frequency: 14318180 >>>>>>> kern.eventtimer.et.HPET1.quality: 450 >>>>>>> kern.eventtimer.et.HPET2.flags: 3 >>>>>>> kern.eventtimer.et.HPET2.frequency: 14318180 >>>>>>> kern.eventtimer.et.HPET2.quality: 450 >>>>>>> kern.eventtimer.et.i8254.flags: 1 >>>>>>> kern.eventtimer.et.i8254.frequency: 1193182 >>>>>>> kern.eventtimer.et.i8254.quality: 100 >>>>>>> kern.eventtimer.et.RTC.flags: 17 >>>>>>> kern.eventtimer.et.RTC.frequency: 32768 >>>>>>> kern.eventtimer.et.RTC.quality: 0 >>>>>>> kern.eventtimer.periodic: 0 >>>>>>> kern.eventtimer.timer: HPET >>>>>> >>>>>> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ >>>>>> Changing this to "i8254" seems to have resolved the stalls. >>>>>> I'm running buildworld -j12 without issue. More than willing >>>>>> to test out a patch or two against head if anyone's still >>>>>> interested, otherwise I've thrown the change into loader.conf >>>>>> and will move along quietly. >>>>> >>>>> 8.2-RELEASE you've mentioned doesn't have event timers subsystem and >>>>> HPET >>>>> timer driver. That makes me think it is strange at least. Can you try >>>>> also >>>>> LAPIC timer and do alike experiments with kern.timeocunter? >>>> >>>> My problems with 8.2-RELEASE may have been network based. I don't >>>> recall >>>> precisely if the clock was stalling there, my guess is no based on >>>> what you wrote. >>>> >>>> I'll test LAPIC next ... so far so good. Just so I'm clear, you'd >>>> like me to tweak >>>> kern.timecounter.hardware as well? (Currently it's HPET). >>> >>> Yes. Instead. Ticking clock depends on both timecounter and eventtimer. >> >> Haven't found a combination that hangs my machine other than with the >> eventtimer at HPET. > > I mean trying eventtimer HPET and different timecounters.
Doesn't seem to help. Eventtimer HPET and timecounter ACPI-fast still stalls. > > If changing timecounter won't help, try please this patch: > > --- acpi_hpet.c.prev 2010-12-25 11:28:45.000000000 +0200 > +++ acpi_hpet.c 2011-05-11 14:30:59.000000000 +0300 > @@ -190,7 +190,7 @@ restart: > bus_write_4(sc->mem_res, HPET_TIMER_COMPARATOR(t->num), > t->next); > } > - if (fdiv < 5000) { > + if (1 || fdiv < 5000) { > bus_read_4(sc->mem_res, HPET_TIMER_COMPARATOR(t->num)); > now = bus_read_4(sc->mem_res, HPET_MAIN_COUNTER); > > -- > Alexander Motin Will do next. _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "freebsd-hackers-unsubscr...@freebsd.org"